The Sipera IPCS 520 includes a security policy framework, intrusion detection and prevention functionality and troubleshooting features. This enables comprehensive security for service providers offering revenue enhancing services based on Session Initiation Protocol (SIP), IP Multimedia Subsystem (IMS) or Unlicensed Mobile Access (UMA) technologies. With WiFi dual-mode phones, consumers and enterprise employees can use cellular networks when roaming, but also connect to WiFi access points and use VoIP, with the same device.”]
Source: https://www.darkreading.com/attacks-breaches/sipera-protects-wifi-phone